package com.lcpress.Interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import com.lcpress.entity.User;

public class LoginInterceptor implements HandlerInterceptor {

	//在请求处理之前进行调用（Controller方法调用之前）
	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
			throws Exception {
		
		boolean flag =true;
		User user=(User)request.getSession().getAttribute("loginuser");
		
		System.out.println("用户状态"+user);
		
        if(null==user){
            response.sendRedirect("/adminuserop/login");
            flag = false;
        }else{
            flag = true;
        }
        
        //如果设置为false时，被请求时，拦截器执行到此处将不会继续操作
        //如果设置为true时，请求将会继续执行后面的操作
        return flag;
		//return HandlerInterceptor.super.preHandle(request, response, handler);
	}

	//请求处理之后进行调用，但是在视图被渲染之前（Controller方法调用之后）
	@Override
	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
			ModelAndView modelAndView) throws Exception {
		 System.out.println("执行了TestInterceptor的postHandle方法");
		//HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
	}

	//在整个请求结束之后被调用，也就是在DispatcherServlet 渲染了对应的视图之后执行（主要是用于进行资源清理工作）
	@Override
	public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
			throws Exception {
		System.out.println("执行了TestInterceptor的afterCompletion方法");
		//HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
	}
	
}
